Write the Specified Quantity as a Function of the Specified $\mathrm { A } = 2 \mathrm { r } ^ { 2 }$

Multiple Choice

Write the specified quantity as a function of the specified variable.
-A circle is inscribed in a square. Write the area of the square as a function of the radius.

A) $\mathrm { A } = 2 \mathrm { r } ^ { 2 }$
B) $\mathrm { A } = 2 \mathrm { r }$
C) $\mathrm { A } = \mathrm { r } ^ { 3 }$
D) $A = 4 r ^ { 2 }$